Adding a TomTom MAP in R-Link

Newbie on this site, so pardon my inexperience with TomTom. I have used TomTom GPS', the GoLive 940 and the XXL, and am familiar with TomTom Home and the map update process (ie basic process).

My wife and I just bought a new car, a 2016 Renault Koleos. We both live in Mexico City and want to take a longer trip to the US. When we contacted the Renault dealer, we were told that a US map is NOT available.

Curiosity kills the cat, so I googled a little bit, and was able to access the SD card that is in the car (with a program called R-Link explorer). The file structure seems familiar what I have seen on my TomToms when I accessed them with file explorer (Windows).

Now the question is, how do I install a US_Mexico map onto the SD and get it to work? I tried copying a map that I copied from my XXL and it doesn't work (no surprise really).

The only software I have and downloaded is R-Link Explorer. I am still new to this, but if I post a R-Link patched map, could you sort of reverse engineer the patch? (sorry, still new to the inner workings of the mysterious TomTom OS).

I can only access the SD card with Windows when the writing protection is OFF (kinda weird). The card shows 4 files, named TOMTOM.000 to TOMTOM.004. All the files are 2 GB in size except the last one, it's 1.4GB. R-Link Explorer shows 0 bytes free (Windows doesn't give me any info.)

The SD card gets updated through a Renault program called R-Link Toolbox.

Still trying to find where the program hides the backup files on my HDD.

Edit:

I just copied those 4 TOMTOM.00X files to my local HDD and they are not visible unless I use R-Link Explorer. Even the option "Show Hidden Files" will not reveal those files.

I am able to open the copied content from the SD card. Maps are in the directory called e.g. common/installed/Chile. Most files have the extension *.dat and a few *.met, one has the extension *.meta. Which file is the magical file or what other information do you need?

Other thoughts. The SD card seems to have a 8GB capacity. In order to install the US_Mexico map, I "d have to put it on a 16GB card or so. I wonder if this card needs to be formatted in a special way...

By file structure it's quite common to new unbreakable go1000/VIA/etc. devices. Impossible to break it.
But if you'll manage to crack navcore (and put it back to navi) - then possibly it'll be worth talking about maps...

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